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RE: Was: Re: PAS Transformer Replacement

Posted by xaudiomanx (A) on March 22, 2011 at 02:34:10

In Reply to: RE: Was: Re: PAS Transformer Replacement posted by Sal Brisindi on March 21, 2011 at 19:31:40:

I would assume Joe or Bill would know the actual specs. You could contact Roy Mottran from Tubes4hifi.com, Triode Electronics, or Van Alstine. These are the guys that have been doing Dynaco forever.

I know Dynaco works on the cheap and unless there is something wrong with the math in calculating the full current draw I can't imagine Dynaco putting out a product that is destined to fail. Even on the cheap.

You do realize that the 12AX7's are in series in both the linestage and the phono sections. What does that do to the current draw in each section? Then they are paralleled back together. When doing th math along with adding in the 6x4 I get 1.2A current draw. So if the power tranny filament is only rated at 800MA you are way over spec.

In looking at the tube specs the 12X4 is only drawing 300MA(.3A). It seems that when adding up the current draw using a 12X4 then that is a much closer match to a 800MA filament winding.

Could all this have something to do with the voltage doubler? I know the doubler is not used for the rectifier.

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